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I don't see anything in the manual defining a specific value.Now I went to start answering about the different styles andthe knob on the value, but that's for reverb. So I guess you'retalking about the pedal-induced effect. Which I hardly everplay with (so far). Do you measure something like this byjust counting seconds a note will hold when holding the sustainpedal all the way down?

How long a note sustains will be the same with or without a sustain pedal, you can just hold the key down with your finger. However, the decay time will vary depending on which note you strike (a low note sustains longer than a high note), and, I believe, how hard you strike it.

I'm not sure what they would report is really the right number. The time it takes for a sample to run completely out to silence is irrelevant most of the time because no one holds notes that long. What matters is how long it takes for most of the sound to decay, and this is what people complain about when they say inexpensive digitals have short decay. The manufacturers modify the samples so most of the sound decays quickly. This hides a multitude of sins the samples manifest--looping, etc.